in the playground,on the playground 区别

【解答】in the playground与on the playground 完全互相替换,意义相同.on the playground最早出现在英式英语中,in the playground出现在美式英语中.下面辞典中出现例子：
■用in的例证：
1.He bullies all other little boys in the playground.他在运动场上称王称霸,欺负其他小男孩.见商务印书馆的《朗文当代高级英语辞典》bully词条
2.He was bashed up in the playground by some older boys.有几个年龄较大的男孩子在操场上对他动武.见商务印书馆的《牛津高阶英汉双解词典》(第四版)bash词条
3.children skipping in the playground 在操场中跳绳的儿童,见商务印书馆的《牛津高阶英汉双解词典》(第四版)skip词条
4.The children were out in the playground letting off steam.那些孩子在操场上玩,宣泄过剩的精力.见商务印书馆的《牛津高阶英汉双解词典》(第四版)steam词条
5.The children were running about in the playground.孩子们在运动场上跑来跑去.见上海外教社的《朗文多功能分类词典》
6.There were children fighting in the playground.见《剑桥高级英语词典》 (Cambridge Advanced Learner’s Dictionary)的fight词条
■用on的例证：
The children ran out and played on the playground at recess.休息的时候孩子奔出来到操场上玩耍.见王文昌主编的《英语搭配大词典》
The boys chalked out goalposts on the playground wall.男孩子们在运动场的墙上用粉笔画上了球门柱.见商务印书馆的《牛津高阶英汉双解词典》(第四版)chalk词条
■另补充用at的例证：
He supervised the children at the playground.他看管在操场上的孩子们.见外研社的《当代美国英语学习词典》的supervise词条.